Please rename said item to "MediaInfo.NET" from "MediaInfo" to differentiate from the vanilla app and, more importantly, add to it your apps icon. Context menu icons are a very important visual aid.
EDIT
Forgot to mention: I know the above can be somewhat achieved by using your OpenWithPP app, but, there are a couple of caveats:
- context menu placement: even if the submenu option is disabled, the option is not in the top section, where it's most easily accesible
- following your
OpenWithPP instructions for this, the resulting option does not work for multiple selected files, as opposed to the default option MediaInfo.NET adds